Expand description
§Luv
Tools for converting colours between sRGB, L*u*v* and LCh(uv) colour spaces and comparing differences in colour.
sRGB colors, for this crate at least, are considered to be composed of u8
values from 0 to 255, while L*u*v* colors are represented by its own
struct that uses f32
values. The crate is biased towards sRGB thus it
also assumes that L*u*v* uses D65 reference white point.
§Usage
§Converting single values
To convert a single value, use one of the functions
luv::Luv::from_rgb(rgb: &[u8; 3]) -> Luv
luv::Luv::from_rgba(rgba: &[u8; 4]) -> Luv
(drops the fourth alpha byte)luv::Luv::to_rgb(&self) -> [u8; 3]
let pink = luv::Luv::from_rgb(&[253, 120, 138]);
assert_eq!(luv::Luv { l: 66.6377, u: 93.02939, v: 9.430343 }, pink);
§Converting multiple values
To convert slices of values
luv::rgbs_to_luvs(rgbs: &[[u8; 3]]) -> Vec<Luv>
luv::luvs_to_rgbs(luvs: &[Luv]) -> Vec<[u8; 3]>
luv::rgb_bytes_to_luvs(bytes: &[u8]) -> Vec<Luv>
luv::luvs_to_rgb_bytes(luvs: &[Luv]) -> Vec<u8>
let rgbs = vec![
[0xFF, 0x69, 0xB6],
[0xE7, 0x00, 0x00],
[0xFF, 0x8C, 0x00],
[0xFF, 0xEF, 0x00],
[0x00, 0x81, 0x1F],
[0x00, 0xC1, 0xC1],
[0x00, 0x44, 0xFF],
[0x76, 0x00, 0x89],
];
let luvs = luv::rgbs_to_luvs(&rgbs);
use luv::rgb_bytes_to_luvs;
let rgbs = vec![
0xFF, 0x69, 0xB6,
0xE7, 0x00, 0x00,
0xFF, 0x8C, 0x00,
0xFF, 0xEF, 0x00,
0x00, 0x81, 0x1F,
0x00, 0xC1, 0xC1,
0x00, 0x44, 0xFF,
0x76, 0x00, 0x89,
];
let luvs = rgb_bytes_to_luvs(&rgbs);
§Features
The crate defines an approx
feature. If enabled, approximate equality as
defined by approx
crate will be
implemented for the Luv
and LCh
types.
§Other crates
The design — and to some degree code — of this crate has been based on the
lab
crate which provides routines for
converting colours between sRGB, L*a*\b and LCh(ab) colour spaces.
For conversion between sRGB and XYZ colour spaces this crate relies on the
srgb
crate.
Structs§
- Struct representing a color in cylindrical CIELCh(uv) color space
- Struct representing a color in CIALuv, a.k.a. L*u*v*, color space
Functions§
- Luv to RGB conversion that returns RGB triples flattened into a
Vec<u8>
- Convenience function to map a slice of Luv values to RGB values in serial
- RGB to Luv conversion that operates on a flat
&[u8]
of consecutive RGB triples. - Convenience function to map a slice of RGB values to Luv values in serial